Restore reverse lookup determinism #6097
Merged
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In #5036, it looks like I wrongly assumed I wouldn't be able to allow having 2 classes of the same type in the type registry without also allowing having 2 objects of the same type.
array_search
can perfectly tell the difference between both situations, so let us continue forbidding that last part, it will allow us to make sure a given type matches exactly one name.